Question

by using tools that observe and record various wavelengths of the em spectrum scientists can learn about
check all that apply
changes to ecosystems on earth

the chemical composition of stars, planets, and galaxies

the temperature of stars and galaxies

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Explanation:

• Observing Earth's ecosystems via EM spectrum tools (like satellite imagery) detects vegetation, land use, and climate-related changes.
• Spectroscopy (EM spectrum analysis) identifies unique chemical signatures in celestial bodies, revealing their composition.
• Wien's Law links an object's peak EM wavelength to its temperature, allowing measurement of stellar/galactic temperatures.

Answer:

• changes to ecosystems on Earth
• the chemical composition of stars, planets, and galaxies
• the temperature of stars and galaxies